Lubricant and process of making same.



UNITED TATES Patented August 11, 1903.

ATENT mace.

LUBRICANT AND PROCESS OF MAKING SAME.

SPECIFICATION forming part of Letters Patent N 0. 736,162, dated August 11, 1903.

Application filed March 20,1901. SerialNo. 52,091. (No specimens.)

To allwhom it may concern.-

Be it known that I, ScoTT A. SMITH, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented a new and useful Improvement in Lubricants and Processes of Manufacturing the Same, of which the following is a specification.

This invention has reference to an improvement in lubricating-oils; and it consists in the peculiar and novel combination with oils of antimony trioxid and the method of combining the same, as will be more fully set forth hereinafter.

Lubricants are used to diminish the friction of parts moving on each other. When the weight of the moving part or the pressure is great, the lubricant must have sufficient body to preserve a smooth slippery surface, and when the speed of the moving part is high the lubricant should contain unctuous and somewhat tenacious matter.

The object of this invention is to incorporate with lubricating-oil trioxid of antimony, which while giving body to the lubricant acts itself to smooth the metallic surfaces in contact.

After a series of experiments in the prod uction of my improved lubricant and a series of practical tests of the lubricant I find that a lubricant made in the herein-described manher is well adapted for machinery and mechanical purposes.

The invention consists in the peculiar and novel method of treating trioxid of antimony with tartaric acid and lime to form calcium-antimony tartrate and incorporating the product with lubricatiug-oil, as will be more fully set forth hereinafter.

Trioxid of antimony is usuallyin the form of an impalpable powder having an unctuous nature and self-adherent character. .When mechanically incorporated with oil, it separates from the oil and forms lumpy masses, which in time are precipitated in the bottom of the vessel. 1

After extended experiments and a series of practical tests I have succeeded in so preparing the calcium-antimony tartrate that it can be incorporated with lubricating-oils.

In carrying out my process I take and thoroughly mix one pound of trioxid of antimony with one-quarter of a pound of powdered tartaric acid in a dry state and then add about half a gill of boiling water and stir the whole mass.

By thoroughly incorporating with the trioXid of antimony a quantity of tartaric acid, with the after addition of water, a chemical union of the mass is effected having an acid character. I now add one pound of powdered air-slaked lime and again stir and sift until the whole is thoroughly mixed and of an alkaline character capable from its nature of being almost infinitely divided or powdered. The mass is then allowed to stand twenty-four hours and is then reduced to an-impalpable powder in a mortar or by any other suitable means.

For each barrel of oil to be treated I take about a gallon of the oil and add one gill of a saturated solution of tartaric acid in water. After thoroughly shaking, this oil is allowed to settle for twelve hours to separate the principal part of the water from the same. The remaining oil in the barrel is now heated to, say, 110 to 120 Fahrenheit, when the above-treated oil is added, the whole being constantly stirred, preferably by mechanical means, so as to thoroughly incorporate the two portions of oil forthe purpose of causing the calcium-antimony tartrate to more readily and permanently unite with the larger mass, as explained. I now add three ounces, or any quantity found preferable, of the powder to the oil while the oil is-suitably stirred, so as to evenly distribute the particles of the powder through the whole bodyof the oil, to which the lighter particles of the powder adhere. After stirring, the oil is allowed to settle and gradually cool. The heavier particles will settle to the bottom of the settling-tank, the oil used being preferably of a sufficient fluid character to admit of this. The product of thiscombination is neu tral in character. The so-treated oil may be used for lubrication. It may be mixed with other lubricating-oils or added to lubricatinggrease. I

Lubricatingoil treated as above described is permanently improved in its lubricating quality.

I am aware that changes in the mode of preparation of the calcium-antimony tartrate finely-divided compound to oil, as and for the purpose described.

2. A lubricating-oil containing calciu m-antirnony tartrate formed and incorporated, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of 20 two subscribing witnesses.

SCOTT A. SMITH.

' Witnesses:

J. A. MILLER, J r., ADA E. HAGERTY. 

